xworm | 282cfa2b9f5afedbf53c6a69f8eda2670fefaab9962c6521ccaf2acb2f1bb8ca

Analysis

max time kernel
147s
max time network
147s
platform
windows10-2004_x64
resource
win10v2004-20240611-en
resource tags

arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system
submitted
30-06-2024 04:14

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General

Target

5ad6806628708095957c45a7f728f941d9b436a25f3f0d2147274403fffd1045.exe
Size

242KB
MD5

ee1ffa80e2398a0f01a99856c1189b21
SHA1

3ee8f72faa73680986b01d017b751098b84802a2
SHA256

5ad6806628708095957c45a7f728f941d9b436a25f3f0d2147274403fffd1045
SHA512

2ec83991815b07330df0a51fae6f9b90ac6f18b9a41273209e1ad0199f5c0f6e70dc440716b112311856334f9e749da4519064ed91e2701a5ea2f98f9ec77caf
SSDEEP

6144:PCMwELbLs3UhcX7elbKTua9bfF/H9d9n:Pds33X3u+

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

154.197.69.131:7005

Attributes

Install_directory
%AppData%
install_file
crss.exe

Signatures

Detect Xworm Payload 2 IoCs

Processes:

resource yara_rule

behavioral2/memory/4976-0-0x00000000009C0000-0x0000000000A02000-memory.dmp family_xworm
C:\Users\Admin\AppData\Roaming\crss.exe family_xworm
Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm
Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs
Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.
execution

PowerShell
T1059.001

Processes:

powershell.exepowershell.exepowershell.exepowershell.exe

pid process

2652 powershell.exe
4004 powershell.exe
2756 powershell.exe
3268 powershell.exe

resource	yara_rule
behavioral2/memory/4976-0-0x00000000009C0000-0x0000000000A02000-memory.dmp	family_xworm
C:\Users\Admin\AppData\Roaming\crss.exe	family_xworm

pid	process
2652	powershell.exe
4004	powershell.exe
2756	powershell.exe
3268	powershell.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

5ad6806628708095957c45a7f728f941d9b436a25f3f0d2147274403fffd1045.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2447855248-390457009-3660902674-1000\Control Panel\International\Geo\Nation	5ad6806628708095957c45a7f728f941d9b436a25f3f0d2147274403fffd1045.exe

Drops startup file 2 IoCs

Processes:

5ad6806628708095957c45a7f728f941d9b436a25f3f0d2147274403fffd1045.exe

description	ioc	process
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\crss.lnk	5ad6806628708095957c45a7f728f941d9b436a25f3f0d2147274403fffd1045.exe
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\crss.lnk	5ad6806628708095957c45a7f728f941d9b436a25f3f0d2147274403fffd1045.exe

Executes dropped EXE 3 IoCs

Processes:

crss.execrss.execrss.exe

pid process

372 crss.exe
3552 crss.exe
2332 crss.exe

pid	process
372	crss.exe
3552	crss.exe
2332	crss.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

Processes:

5ad6806628708095957c45a7f728f941d9b436a25f3f0d2147274403fffd1045.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-2447855248-390457009-3660902674-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\crss = "C:\\Users\\Admin\\AppData\\Roaming\\crss.exe"	5ad6806628708095957c45a7f728f941d9b436a25f3f0d2147274403fffd1045.exe

Looks up external IP address via web service 1 IoCs
Uses a legitimate IP lookup service to find the infected system's external IP.

Processes:

flow ioc

16 ip-api.com
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
persistence execution

Scheduled Task
T1053.005

Processes:

schtasks.exe

pid process

2688 schtasks.exe

flow	ioc
16	ip-api.com

pid	process
2688	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

Processes:

powershell.exepowershell.exepowershell.exepowershell.exe5ad6806628708095957c45a7f728f941d9b436a25f3f0d2147274403fffd1045.exe

pid	process
2756	powershell.exe
2756	powershell.exe
3268	powershell.exe
3268	powershell.exe
2652	powershell.exe
2652	powershell.exe
4004	powershell.exe
4004	powershell.exe
4976	5ad6806628708095957c45a7f728f941d9b436a25f3f0d2147274403fffd1045.exe

Suspicious use of AdjustPrivilegeToken 9 IoCs

Processes:

5ad6806628708095957c45a7f728f941d9b436a25f3f0d2147274403fffd1045.exepowershell.exepowershell.exepowershell.exepowershell.execrss.execrss.execrss.exe

description	pid	process
Token: SeDebugPrivilege	4976	5ad6806628708095957c45a7f728f941d9b436a25f3f0d2147274403fffd1045.exe
Token: SeDebugPrivilege	2756	powershell.exe
Token: SeDebugPrivilege	3268	powershell.exe
Token: SeDebugPrivilege	2652	powershell.exe
Token: SeDebugPrivilege	4004	powershell.exe
Token: SeDebugPrivilege	4976	5ad6806628708095957c45a7f728f941d9b436a25f3f0d2147274403fffd1045.exe
Token: SeDebugPrivilege	372	crss.exe
Token: SeDebugPrivilege	3552	crss.exe
Token: SeDebugPrivilege	2332	crss.exe

Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

5ad6806628708095957c45a7f728f941d9b436a25f3f0d2147274403fffd1045.exe

pid process

4976 5ad6806628708095957c45a7f728f941d9b436a25f3f0d2147274403fffd1045.exe

pid	process
4976	5ad6806628708095957c45a7f728f941d9b436a25f3f0d2147274403fffd1045.exe

Suspicious use of WriteProcessMemory 10 IoCs

Processes:

5ad6806628708095957c45a7f728f941d9b436a25f3f0d2147274403fffd1045.exe

description	pid	process	target process
PID 4976 wrote to memory of 2756	4976	5ad6806628708095957c45a7f728f941d9b436a25f3f0d2147274403fffd1045.exe	powershell.exe
PID 4976 wrote to memory of 2756	4976	5ad6806628708095957c45a7f728f941d9b436a25f3f0d2147274403fffd1045.exe	powershell.exe
PID 4976 wrote to memory of 3268	4976	5ad6806628708095957c45a7f728f941d9b436a25f3f0d2147274403fffd1045.exe	powershell.exe
PID 4976 wrote to memory of 3268	4976	5ad6806628708095957c45a7f728f941d9b436a25f3f0d2147274403fffd1045.exe	powershell.exe
PID 4976 wrote to memory of 2652	4976	5ad6806628708095957c45a7f728f941d9b436a25f3f0d2147274403fffd1045.exe	powershell.exe
PID 4976 wrote to memory of 2652	4976	5ad6806628708095957c45a7f728f941d9b436a25f3f0d2147274403fffd1045.exe	powershell.exe
PID 4976 wrote to memory of 4004	4976	5ad6806628708095957c45a7f728f941d9b436a25f3f0d2147274403fffd1045.exe	powershell.exe
PID 4976 wrote to memory of 4004	4976	5ad6806628708095957c45a7f728f941d9b436a25f3f0d2147274403fffd1045.exe	powershell.exe
PID 4976 wrote to memory of 2688	4976	5ad6806628708095957c45a7f728f941d9b436a25f3f0d2147274403fffd1045.exe	schtasks.exe
PID 4976 wrote to memory of 2688	4976	5ad6806628708095957c45a7f728f941d9b436a25f3f0d2147274403fffd1045.exe	schtasks.exe

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\5ad6806628708095957c45a7f728f941d9b436a25f3f0d2147274403fffd1045.exe
"C:\Users\Admin\AppData\Local\Temp\5ad6806628708095957c45a7f728f941d9b436a25f3f0d2147274403fffd1045.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4976

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\5ad6806628708095957c45a7f728f941d9b436a25f3f0d2147274403fffd1045.exe'
2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2756

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess '5ad6806628708095957c45a7f728f941d9b436a25f3f0d2147274403fffd1045.exe'
2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3268

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Roaming\crss.exe'
2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2652

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'crss.exe'
2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4004

C:\Windows\System32\schtasks.exe
"C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "crss" /tr "C:\Users\Admin\AppData\Roaming\crss.exe"
2⤵
- Scheduled Task/Job: Scheduled Task
PID:2688

C:\Users\Admin\AppData\Roaming\crss.exe
C:\Users\Admin\AppData\Roaming\crss.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:372

C:\Users\Admin\AppData\Roaming\crss.exe
C:\Users\Admin\AppData\Roaming\crss.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:3552

C:\Users\Admin\AppData\Roaming\crss.exe
C:\Users\Admin\AppData\Roaming\crss.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2332

Network

MITRE ATT&CK Matrix ATT&CK v13

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\crss.exe.log
Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log
Filesize
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Filesize
944B

MD5
77d622bb1a5b250869a3238b9bc1402b

SHA1
d47f4003c2554b9dfc4c16f22460b331886b191b

SHA256
f97ff12a8abf4bf88bb6497bd2ac2da12628c8847a8ba5a9026bdbb76507cdfb

SHA512
d6789b5499f23c9035375a102271e17a8a82e57d6f5312fa24242e08a83efdeb8becb7622f55c4cf1b89c7d864b445df11f4d994cf7e2f87a900535bcca12fd9

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Filesize
944B

MD5
d3e8199b4634731cf0a0c26c1f14f588

SHA1
7f8fae27eb80055a436a6b5457978f32673d9ad4

SHA256
ef33f487f93c2977e92fb08d6bdcc9d48b5d1864c402f9d3fbf3e1b30e8b3b9a

SHA512
806a123100dbc1ca1b27bbad5b93c3a9a840dc795127af8523333a71259a8c5ef8aefccb83ef390f2644e013f138c4b7b63c584acccb197aada0c70c038032e2

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
Filesize
944B

MD5
0530db584e23072ef1f8032cc65035a2

SHA1
1c93b7d0fd0d4fd08e2d4c04760c2ab9d14468c4

SHA256
2e41748c8968123438e56c4ebf3e3fb689856ec19bc8d9d484e5fe7249dec05e

SHA512
a9a8a61f4d7ca92f2c550c626799b74bdc4df7c4184ff040d4e3f3ffdceaaa14c181d1d4305d0d0eaf2ec5a6e76d4454f58c16e6464ec02c0725cc0f75ba62ea

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ady3swdv.m5v.ps1
Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Roaming\crss.exe
Filesize
242KB

MD5
ee1ffa80e2398a0f01a99856c1189b21

SHA1
3ee8f72faa73680986b01d017b751098b84802a2

SHA256
5ad6806628708095957c45a7f728f941d9b436a25f3f0d2147274403fffd1045

SHA512
2ec83991815b07330df0a51fae6f9b90ac6f18b9a41273209e1ad0199f5c0f6e70dc440716b112311856334f9e749da4519064ed91e2701a5ea2f98f9ec77caf

Download Submit
memory/2756-13-0x00000211268E0000-0x0000021126902000-memory.dmp

Filesize
136KB

Download
memory/2756-18-0x00007FFD41B20000-0x00007FFD425E1000-memory.dmp

Filesize
10.8MB

Download
memory/2756-15-0x00007FFD41B20000-0x00007FFD425E1000-memory.dmp

Filesize
10.8MB

Download
memory/2756-14-0x00007FFD41B20000-0x00007FFD425E1000-memory.dmp

Filesize
10.8MB

Download
memory/2756-3-0x00007FFD41B20000-0x00007FFD425E1000-memory.dmp

Filesize
10.8MB

Download
memory/4976-0-0x00000000009C0000-0x0000000000A02000-memory.dmp

Filesize
264KB

Download
memory/4976-57-0x00007FFD41B23000-0x00007FFD41B25000-memory.dmp

Filesize
8KB

Download
memory/4976-2-0x00007FFD41B20000-0x00007FFD425E1000-memory.dmp

Filesize
10.8MB

Download
memory/4976-60-0x00007FFD41B20000-0x00007FFD425E1000-memory.dmp

Filesize
10.8MB

Download
memory/4976-1-0x00007FFD41B23000-0x00007FFD41B25000-memory.dmp

Filesize
8KB

Download